================================================================== BUG: KCSAN: data-race in pollwake / pollwake write to 0xffffc9000246ba20 of 4 bytes by interrupt on cpu 1: __pollwake fs/select.c:197 [inline] pollwake+0xe3/0x140 fs/select.c:217 __wake_up_common+0x7b/0x180 kernel/sched/wait.c:93 __wake_up_common_lock+0x77/0xb0 kernel/sched/wait.c:123 __wake_up+0xe/0x10 kernel/sched/wait.c:142 snd_pcm_update_state+0x29e/0x330 sound/core/pcm_lib.c:198 snd_pcm_update_hw_ptr0+0xa05/0x1280 sound/core/pcm_lib.c:453 snd_pcm_period_elapsed+0x10d/0x1a0 sound/core/pcm_lib.c:1794 dummy_hrtimer_callback+0x9e/0x110 sound/drivers/dummy.c:378 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x274/0x5f0 kernel/time/hrtimer.c:1579 hrtimer_run_softirq+0x10e/0x150 kernel/time/hrtimer.c:1596 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:690 default_idle_call+0x1e/0x40 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x1c2/0x290 kernel/sched/idle.c:269 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:361 start_secondary+0x168/0x1b0 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 write to 0xffffc9000246ba20 of 4 bytes by interrupt on cpu 0: __pollwake fs/select.c:197 [inline] pollwake+0xe3/0x140 fs/select.c:217 __wake_up_common+0x7b/0x180 kernel/sched/wait.c:93 __wake_up_common_lock+0x77/0xb0 kernel/sched/wait.c:123 __wake_up+0xe/0x10 kernel/sched/wait.c:142 ring_buffer_wakeup kernel/events/core.c:5617 [inline] perf_event_wakeup+0x8c/0x160 kernel/events/core.c:6039 perf_pending_event+0x12d/0x170 kernel/events/core.c:6098 irq_work_run_list+0x136/0x190 kernel/irq_work.c:156 irq_work_run+0x48/0xa0 kernel/irq_work.c:172 smp_irq_work_interrupt+0x3f/0x100 arch/x86/kernel/irq_work.c:21 irq_work_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:860 write_comp_data+0x0/0x70 kernel/kcov.c:197 __read_once_size+0x25/0xe0 include/linux/compiler.h:232 pipe_poll+0x9c/0x230 fs/pipe.c:635 vfs_poll include/linux/poll.h:90 [inline] do_select+0x7d0/0x1020 fs/select.c:534 core_sys_select+0x312/0x650 fs/select.c:677 do_pselect.constprop.0+0x11d/0x160 fs/select.c:759 __do_sys_pselect6 fs/select.c:784 [inline] __se_sys_pselect6 fs/select.c:769 [inline] __x64_sys_pselect6+0x12e/0x170 fs/select.c:769 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 29164 Comm: syz-executor.4 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================